Abstract
El Niño, which has dramatically altered the climate in many regions around the globe, also infinitesimally increases the length of the day (LOD), scientists at the 1998 AGU Spring Meeting reported on May 26. They say these tiny changes could affect global and interplanetary navigation, and provide an important clue about energy distribution within the Earth system and how components of the system work together.During the peak period of the current El Niño, LOD increased temporarily by about 600–700 microseconds, according to John Gipson, a scientist with NVI, Inc., based at the NASA Goddard Space Flight Center in Greenbelt, Md. He says the increase is not as much as the peak increase of about 800 microseconds, (less than l/1000ths of a second), registered during the strong 1982–1983 El Niño episode.
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